One was purchased at Jennifer's Gift Shop in San Jose. The other was bought at a Gateway Newstand in Atlanta, according to WXIA-TV.

The jackpot numbers: 8, 14, 17, 20, 39; Mega Ball: 7.

The size of the prize: Possibly as much as $645 million, which would be the second-most in U.S. history (behind a $656 million Mega Millions jackpot in March). Officials are still calculating. As of late Tuesday, the jackpot had been pegged at $636 million. But a surge in ticket sales likely pushed it even higher.

When the expected jackpot was $636 million, officials estimated that the "cash option" value (taking the prize in one lump sum, as most lucky folks elect to do) if only one winning ticket was sold would have been at least $341 million. Split that in two and each of the actual winning tickets would appear to be worth more than $170 million. Of course, taxes will need to be paid and the tickets may have been bought by groups of people, not individuals.

Thuy Nguyen, owner of the store in San Jose where one winner was sold, will be getting $1 million for selling the ticket. "I am so happy, I feel good," he tells the Mercury News.